P1317 – Fuel Injector Stuck Open
Want to confirm the real cause of this fault code?
A high‑quality OBD2 scanner gives you live data, fuel trims, sensor readings and freeze‑frame information — exactly what you need to verify the root cause of this code with confidence.
Symptoms
- Black smoke
- Fuel smell
- Rough idle
- Poor fuel economy
Causes
- Injector failure
- Debris contamination
- ECU driver fault
Diagnosis
- Check injector balance
- Inspect fuel trims
- Scan ECU
- Check injector resistance
Repair
- Replace injector
- Clean fuel system
- Repair ECU driver